i had tw one a new bushmaster cost me 999 new i bought a ar from the indyswat team gunsmith that had a bushmaster lower and a dpms upper good gun 800 for it

i would go with bushmaster which will cost you around 850 to 900 get a removable carry handle not just a flat top with the carry handle they look more like a military gun and are good for close shooting

or go with colt or dpms most other makers are either cheap or cost to much i would not go changing the trigger or anything unless you plan to shoot comp. there fine stock plan on arond 1000 atless there good guns and i plan to bu another bushmaster soon